1 # SPDX-License-Identifier: GPL-2.0-only <<
2 # ALSA soundcard-configuration 1 # ALSA soundcard-configuration
3 config SND_TIMER 2 config SND_TIMER
4 tristate 3 tristate
5 4
6 config SND_PCM 5 config SND_PCM
7 tristate 6 tristate
8 select SND_TIMER if SND_PCM_TIMER !! 7 select SND_TIMER
9 <<
10 config SND_PCM_ELD <<
11 bool <<
12 <<
13 config SND_PCM_IEC958 <<
14 bool <<
15 <<
16 config SND_DMAENGINE_PCM <<
17 tristate <<
18 8
19 config SND_HWDEP 9 config SND_HWDEP
20 tristate 10 tristate
21 11
22 config SND_SEQ_DEVICE <<
23 tristate <<
24 <<
25 config SND_RAWMIDI 12 config SND_RAWMIDI
26 tristate 13 tristate
27 select SND_SEQ_DEVICE if SND_SEQUENCER <<
28 <<
29 config SND_UMP <<
30 tristate <<
31 select SND_RAWMIDI <<
32 <<
33 config SND_UMP_LEGACY_RAWMIDI <<
34 bool "Legacy raw MIDI support for UMP <<
35 depends on SND_UMP <<
36 help <<
37 This option enables the legacy raw M <<
38 When this option is set, an addition <<
39 legacy MIDI 1.0 byte streams is crea <<
40 The device contains 16 substreams co <<
41 <<
42 config SND_CORE_TEST <<
43 tristate "Sound core KUnit test" <<
44 depends on KUNIT <<
45 select SND_PCM <<
46 default KUNIT_ALL_TESTS <<
47 help <<
48 This options enables the sound core <<
49 <<
50 KUnit tests run during boot and outp <<
51 log in TAP format (https://testanyth <<
52 kernel devs running KUnit test harne <<
53 into a production build. <<
54 <<
55 For more information on KUnit and un <<
56 to the KUnit documentation in Docume <<
57 <<
58 14
59 config SND_COMPRESS_OFFLOAD 15 config SND_COMPRESS_OFFLOAD
60 tristate 16 tristate
61 17
>> 18 # To be effective this also requires INPUT - users should say:
>> 19 # select SND_JACK if INPUT=y || INPUT=SND
>> 20 # to avoid having to force INPUT on.
62 config SND_JACK 21 config SND_JACK
63 bool 22 bool
64 23
65 # enable input device support in jack layer !! 24 config SND_SEQUENCER
66 config SND_JACK_INPUT_DEV !! 25 tristate "Sequencer support"
67 bool !! 26 select SND_TIMER
68 depends on SND_JACK !! 27 help
69 default y if INPUT=y || INPUT=SND !! 28 Say Y or M to enable MIDI sequencer and router support. This
>> 29 feature allows routing and enqueueing of MIDI events. Events
>> 30 can be processed at a given time.
>> 31
>> 32 Many programs require this feature, so you should enable it
>> 33 unless you know what you're doing.
>> 34
>> 35 config SND_SEQ_DUMMY
>> 36 tristate "Sequencer dummy client"
>> 37 depends on SND_SEQUENCER
>> 38 help
>> 39 Say Y here to enable the dummy sequencer client. This client
>> 40 is a simple MIDI-through client: all normal input events are
>> 41 redirected to the output port immediately.
>> 42
>> 43 You don't need this unless you want to connect many MIDI
>> 44 devices or applications together.
>> 45
>> 46 To compile this driver as a module, choose M here: the module
>> 47 will be called snd-seq-dummy.
70 48
71 config SND_OSSEMUL 49 config SND_OSSEMUL
72 bool "Enable OSS Emulation" <<
73 select SOUND_OSS_CORE 50 select SOUND_OSS_CORE
74 help !! 51 bool
75 This option enables the build of OSS <<
76 52
77 config SND_MIXER_OSS 53 config SND_MIXER_OSS
78 tristate "OSS Mixer API" 54 tristate "OSS Mixer API"
79 depends on SND_OSSEMUL !! 55 select SND_OSSEMUL
80 help 56 help
81 To enable OSS mixer API emulation (/ 57 To enable OSS mixer API emulation (/dev/mixer*), say Y here
82 and read <file:Documentation/sound/d !! 58 and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
83 59
84 Many programs still use the OSS API, 60 Many programs still use the OSS API, so say Y.
85 61
86 To compile this driver as a module, 62 To compile this driver as a module, choose M here: the module
87 will be called snd-mixer-oss. 63 will be called snd-mixer-oss.
88 64
89 config SND_PCM_OSS 65 config SND_PCM_OSS
90 tristate "OSS PCM (digital audio) API" 66 tristate "OSS PCM (digital audio) API"
91 depends on SND_OSSEMUL !! 67 select SND_OSSEMUL
92 select SND_PCM 68 select SND_PCM
93 help 69 help
94 To enable OSS digital audio (PCM) em 70 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
95 here and read <file:Documentation/so !! 71 here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
96 72
97 Many programs still use the OSS API, 73 Many programs still use the OSS API, so say Y.
98 74
99 To compile this driver as a module, 75 To compile this driver as a module, choose M here: the module
100 will be called snd-pcm-oss. 76 will be called snd-pcm-oss.
101 77
102 config SND_PCM_OSS_PLUGINS 78 config SND_PCM_OSS_PLUGINS
103 bool "OSS PCM (digital audio) API - In 79 bool "OSS PCM (digital audio) API - Include plugin system"
104 depends on SND_PCM_OSS 80 depends on SND_PCM_OSS
105 default y !! 81 default y
106 help 82 help
107 If you disable this option, the ALSA !! 83 If you disable this option, the ALSA's OSS PCM API will not
108 support conversion of channels, form !! 84 support conversion of channels, formats and rates. It will
109 behave like most of new OSS/Free dri !! 85 behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
110 !! 86
111 config SND_PCM_TIMER !! 87 config SND_SEQUENCER_OSS
112 bool "PCM timer interface" if EXPERT !! 88 bool "OSS Sequencer API"
113 default y !! 89 depends on SND_SEQUENCER
>> 90 select SND_OSSEMUL
114 help 91 help
115 If you disable this option, pcm time !! 92 Say Y here to enable OSS sequencer emulation (both
116 those stubs that use pcm timer (e.g. !! 93 /dev/sequencer and /dev/music interfaces).
117 incorrectly. <<
118 94
119 For some embedded devices, we may di !! 95 Many programs still use the OSS API, so say Y.
120 footprint, about 20KB on x86_64 plat !! 96
>> 97 If you choose M in "Sequencer support" (SND_SEQUENCER),
>> 98 this will be compiled as a module. The module will be called
>> 99 snd-seq-oss.
121 100
122 config SND_HRTIMER 101 config SND_HRTIMER
123 tristate "HR-timer backend support" 102 tristate "HR-timer backend support"
124 depends on HIGH_RES_TIMERS 103 depends on HIGH_RES_TIMERS
125 select SND_TIMER 104 select SND_TIMER
126 help 105 help
127 Say Y here to enable HR-timer backen 106 Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
128 the hrtimer as a precise timing sour 107 the hrtimer as a precise timing source. The ALSA sequencer code
129 also can use this timing source. 108 also can use this timing source.
130 109
131 To compile this driver as a module, 110 To compile this driver as a module, choose M here: the module
132 will be called snd-hrtimer. 111 will be called snd-hrtimer.
133 112
>> 113 config SND_SEQ_HRTIMER_DEFAULT
>> 114 bool "Use HR-timer as default sequencer timer"
>> 115 depends on SND_HRTIMER && SND_SEQUENCER
>> 116 default y
>> 117 help
>> 118 Say Y here to use the HR-timer backend as the default sequencer
>> 119 timer.
>> 120
>> 121 config SND_RTCTIMER
>> 122 tristate "RTC Timer support"
>> 123 depends on RTC
>> 124 select SND_TIMER
>> 125 help
>> 126 Say Y here to enable RTC timer support for ALSA. ALSA uses
>> 127 the RTC timer as a precise timing source and maps the RTC
>> 128 timer to ALSA's timer interface. The ALSA sequencer code also
>> 129 can use this timing source.
>> 130
>> 131 To compile this driver as a module, choose M here: the module
>> 132 will be called snd-rtctimer.
>> 133
>> 134 Note that this option is exclusive with the new RTC drivers
>> 135 (CONFIG_RTC_CLASS) since this requires the old API.
>> 136
>> 137 config SND_SEQ_RTCTIMER_DEFAULT
>> 138 bool "Use RTC as default sequencer timer"
>> 139 depends on SND_RTCTIMER && SND_SEQUENCER
>> 140 depends on !SND_SEQ_HRTIMER_DEFAULT
>> 141 default y
>> 142 help
>> 143 Say Y here to use the RTC timer as the default sequencer
>> 144 timer. This is strongly recommended because it ensures
>> 145 precise MIDI timing even when the system timer runs at less
>> 146 than 1000 Hz.
>> 147
>> 148 If in doubt, say Y.
>> 149
134 config SND_DYNAMIC_MINORS 150 config SND_DYNAMIC_MINORS
135 bool "Dynamic device file minor number 151 bool "Dynamic device file minor numbers"
136 help 152 help
137 If you say Y here, the minor numbers 153 If you say Y here, the minor numbers of ALSA device files in
138 /dev/snd/ are allocated dynamically. 154 /dev/snd/ are allocated dynamically. This allows you to have
139 more than 8 sound cards, but require 155 more than 8 sound cards, but requires a dynamic device file
140 system like udev. 156 system like udev.
141 157
142 If you are unsure about this, say N 158 If you are unsure about this, say N here.
143 159
144 config SND_MAX_CARDS <<
145 int "Max number of sound cards" <<
146 range 4 256 <<
147 default 32 <<
148 depends on SND_DYNAMIC_MINORS <<
149 help <<
150 Specify the max number of sound card <<
151 on a single machine. <<
152 <<
153 config SND_SUPPORT_OLD_API 160 config SND_SUPPORT_OLD_API
154 bool "Support old ALSA API" 161 bool "Support old ALSA API"
155 default y 162 default y
156 help 163 help
157 Say Y here to support the obsolete A 164 Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
158 or older). 165 or older).
159 166
160 config SND_PROC_FS <<
161 bool "Sound Proc FS Support" if EXPERT <<
162 depends on PROC_FS <<
163 default y <<
164 help <<
165 Say 'N' to disable Sound proc FS, wh <<
166 9KB on x86_64 platform. <<
167 If unsure say Y. <<
168 <<
169 config SND_VERBOSE_PROCFS 167 config SND_VERBOSE_PROCFS
170 bool "Verbose procfs contents" 168 bool "Verbose procfs contents"
171 depends on SND_PROC_FS !! 169 depends on PROC_FS
172 default y 170 default y
173 help 171 help
174 Say Y here to include code for verbo 172 Say Y here to include code for verbose procfs contents (provides
175 useful information to developers whe !! 173 useful information to developers when a problem occurs). On the
176 other side, it makes the ALSA subsys !! 174 other side, it makes the ALSA subsystem larger.
177 175
178 config SND_CTL_FAST_LOOKUP !! 176 config SND_VERBOSE_PRINTK
179 bool "Fast lookup of control elements" !! 177 bool "Verbose printk"
180 default y <<
181 select XARRAY_MULTI <<
182 help 178 help
183 This option enables the faster looku !! 179 Say Y here to enable verbose log messages. These messages
184 It will consume more memory because !! 180 will help to identify source file and position containing
185 If you want to choose the memory foo !! 181 printed messages.
186 inevitably, turn this off. !! 182
>> 183 You don't need this unless you're debugging ALSA.
187 184
188 config SND_DEBUG 185 config SND_DEBUG
189 bool "Debug" 186 bool "Debug"
190 help 187 help
191 Say Y here to enable ALSA debug code 188 Say Y here to enable ALSA debug code.
192 189
193 config SND_DEBUG_VERBOSE 190 config SND_DEBUG_VERBOSE
194 bool "More verbose debug" 191 bool "More verbose debug"
195 depends on SND_DEBUG 192 depends on SND_DEBUG
196 help 193 help
197 Say Y here to enable extra-verbose d 194 Say Y here to enable extra-verbose debugging messages.
198 !! 195
199 Let me repeat: it enables EXTRA-VERB 196 Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
200 So, say Y only if you are ready to b 197 So, say Y only if you are ready to be annoyed.
201 198
202 config SND_PCM_XRUN_DEBUG 199 config SND_PCM_XRUN_DEBUG
203 bool "Enable PCM ring buffer overrun/u 200 bool "Enable PCM ring buffer overrun/underrun debugging"
204 default n 201 default n
205 depends on SND_DEBUG && SND_VERBOSE_PR 202 depends on SND_DEBUG && SND_VERBOSE_PROCFS
206 help 203 help
207 Say Y to enable the PCM ring buffer 204 Say Y to enable the PCM ring buffer overrun/underrun debugging.
208 It is usually not required, but if y 205 It is usually not required, but if you have trouble with
209 sound clicking when system is loaded 206 sound clicking when system is loaded, it may help to determine
210 the process or driver which causes t 207 the process or driver which causes the scheduling gaps.
211 208
212 config SND_CTL_INPUT_VALIDATION <<
213 bool "Validate input data to control A <<
214 help <<
215 Say Y to enable the additional valid <<
216 each control element, including the <<
217 An error is returned from ALSA core <<
218 passing to the driver. This is a ki <<
219 that have no proper error checks, at <<
220 performance overhead. <<
221 <<
222 config SND_CTL_DEBUG <<
223 bool "Enable debugging feature for con <<
224 depends on SND_DEBUG <<
225 help <<
226 Say Y to enable the debugging featur <<
227 It performs the additional sanity-ch <<
228 read access, such as whether the val <<
229 are in the proper ranges or the chec <<
230 out-of-array areas. The error is pr <<
231 such unexpected values. <<
232 When you develop a driver that deals <<
233 strongly recommended to try this one <<
234 any relevant errors or not. <<
235 <<
236 config SND_JACK_INJECTION_DEBUG <<
237 bool "Sound jack injection interface v <<
238 depends on SND_JACK && SND_DEBUG && DE <<
239 help <<
240 This option can be used to enable or <<
241 software injection. <<
242 Say Y if you are debugging via jack <<
243 If unsure select "N". <<
244 <<
245 config SND_UTIMER <<
246 bool "Enable support for userspace-con <<
247 depends on SND_TIMER <<
248 help <<
249 Say Y to enable the support of users <<
250 timers are purely virtual, and they <<
251 from userspace. They could be quite <<
252 sound timing with userspace applicat <<
253 data through snd-aloop). <<
254 <<
255 config SND_VMASTER 209 config SND_VMASTER
256 bool 210 bool
257 211
>> 212 config SND_KCTL_JACK
>> 213 bool
>> 214
258 config SND_DMA_SGBUF 215 config SND_DMA_SGBUF
259 def_bool y 216 def_bool y
260 depends on X86 217 depends on X86
261 <<
262 config SND_CTL_LED <<
263 tristate <<
264 select NEW_LEDS if SND_CTL_LED <<
265 select LEDS_TRIGGERS if SND_CTL_LED <<
266 218
267 source "sound/core/seq/Kconfig" 219 source "sound/core/seq/Kconfig"
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